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Chemistry
The least stable free radical is
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Q. The least stable free radical is
KEAM
KEAM 2012
Organic Chemistry – Some Basic Principles and Techniques
A
$CH_{3}\overset{\bullet}{C}H_{2}$
0%
B
$CH_{3}CH_{2}\overset{\bullet}{C}H_{2}$
0%
C
$\left(CH_{3}\right)_{2} \overset{\bullet}{C}H$
33%
D
$\left(CH_{2}\right)_{3} \overset{\bullet}{C}$
17%
E
$\overset{\bullet}{C}H_{3}$
17%
Solution:
As the number of hyperconjugative structures $(\alpha- H$ atoms $)$ increases, stability of free radical increases.
Since, $\overset{\bullet}{ CH _{3}}$ has no hyperconjugative structure, so it is least stable.
